Route · PSC → SEA · 2020–2025 BTS data
Pasco/Kennewick/Richland to Seattle
The PSC–SEA corridor (Pasco/Kennewick/Richland, WA → Seattle, WA) runs ahead of the national average, served by 5 carriers across roughly 172 miles.
Data updated 2026-06-13
- 88.4%
- On-time
- +9.4 pts
- vs US avg
- 73 min
- Delay when late
- 13,305
- Flights
Cancelled
0.7%
Best Month
Mar 2024 94%
Worst Month
Jan 2024 73%
Distance
172 mi
Carriers
5
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 159 | 20 | 0 | 0 | AS,OO |
| Nov 2025 | 163 | 15 | 7 | 0 | OO,AS |
| Oct 2025 | 213 | 24 | 2 | 0 | AS,OO |
| Sep 2025 | 167 | 20 | 0 | 0 | OO,AS |
| Aug 2025 | 180 | 22 | 2 | 0 | OO,AS |
| Jul 2025 | 185 | 24 | 0 | 0 | AS,OO |
| Jun 2025 | 192 | 27 | 0 | 0 | AS,OO |
| May 2025 | 235 | 31 | 2 | 0 | AS,OO |
| Apr 2025 | 146 | 12 | 0 | 0 | OO,AS |
| Mar 2025 | 133 | 15 | 0 | 0 | AS,OO |
| Feb 2025 | 122 | 28 | 1 | 0 | AS,OO |
| Jan 2025 | 153 | 26 | 0 | 0 | AS,OO |
| Dec 2024 | 189 | 26 | 1 | 0 | AS,OO |
| Nov 2024 | 155 | 21 | 0 | 0 | OO,AS |
| Oct 2024 | 143 | 10 | 0 | 0 | AS,OO |
| Sep 2024 | 115 | 15 | 1 | 1 | OO,AS |
| Aug 2024 | 157 | 25 | 0 | 0 | AS,OO |
| Jul 2024 | 177 | 34 | 0 | 0 | AS,OO |
| Jun 2024 | 166 | 31 | 1 | 0 | AS,OO |
| May 2024 | 169 | 23 | 0 | 0 | AS,OO |
| Apr 2024 | 144 | 14 | 0 | 0 | AS,OO |
| Mar 2024 | 119 | 7 | 0 | 0 | AS,OO |
| Feb 2024 | 110 | 13 | 1 | 0 | AS,OO |
| Jan 2024 | 125 | 34 | 8 | 0 | AS,OO |
Cancellation Rate
0.7%
26 of 3,817 flights
Diversion Rate
0.0%
1 of 3,817 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PSC - Pasco/Kennewick/Richland
Full on-time, delay-cause, and seasonal performance for Pasco/Kennewick/Richland, WA.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See PSC and SEA side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to PSC–SEA.
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What the Data Says About PSC to SEA
Pasco/Kennewick/Richland to Seattle (PSC to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.4% on-time rate across 13,305 flights, with delays that do happen averaging 72.5 minutes. The corridor runs roughly 172 miles and is served by 5 carriers. Over the most recent 24 months, 26 of 3,817 flights were cancelled (0.7%) and 1 diverted (0.0%).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 94% on-time, while Jan 2024 came in at just 73% - a 21-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.